// pages/splb/splb.js
Page({

    /**
     * 页面的初始数据
     */
    data: {
        baselURL: wx.baselURL,
        total: 0,
        rows: [],
        brandSlected: {},//已选品牌
        brands: [],
        brandVisible: false,
        query: {
            key: '',//搜索关键字
            brandIds: '',
            sorted: 0,
            pageNum: 1,
            pageSize: 10
        },
        total: 0,
        baselURL: wx.baselURL
    },
    // 切换品牌弹窗
    changeShowBrands() {
        let brandSlected = {}
        if (!this.data.brandVisible && this.data.query.brandIds) { // 打开品牌弹框
            // 按上一次选择结果初始化已选中品牌
            let brandIds = this.data.query.brandIds.split(',')
            for (let i = 0; i < brandIds.length; i++) {
                brandSlected[brandIds[i]] = true
            }
        }
        this.setData({
            brandVisible: !this.data.brandVisible,
            brandSlected
        })
    },

    //输入搜索关键字
    inputKey(e) {
        this.data.query.key = e.detail.value
    },
    //清空选择的品牌
    clearBrand() {
        this.setData({
            brandSlected: {}
        })
    },
    //按品牌进行搜索
    confimBrand() {
        let brandIds = []
        for (let key in this.data.brandSlected) {//取出选择的品牌id
            if (key && this.data.brandSlected[key]) brandIds.push(key)
        }
        this.data.query.brandIds = brandIds.join(',')
        this.refresh(() => {
            this.setData({
                brandVisible: false
            })
        })
    },
    //切换品牌选中状态
    changeBrand(e) {
        let brandSlected = this.data.brandSlected
        let id = e.currentTarget.dataset.id
        brandSlected[id] = !brandSlected[id] //取反 切换选中状态
        this.setData({
            brandSlected
        })
    },
    //修改排序方式
    changeSorted(e) {
        console.log(e)
        let sorted = e.currentTarget.dataset.sorted
        this.setData({
            'query.sorted': sorted
        })
        this.refresh()
    },
    //重新加载
    refresh(next) {
        this.data.query.pageNum = 1
        this.data.rows = []
        this.data.total = 0
        this.getList(next)
    },

    //跳转商品详情页面
    detail() {
        wx.navigateTo({
            url: '/pages/goods_detail/goods_detail',
        })
    },
    list() {
        wx.switchTab({
            url: '/pages/fenlei/fenlei'
        })
    },
    getList: function (next) {
        wx.get('/products', this.data.query).then(res => {
            console.log(res)
            res.rows.forEach((item, index) => {//图片切割
                item.img = item.productImgs.split(',')[0]
            });
            this.setData({
                total: res.total,
                rows: this.data.rows.concat(res.rows)
            })
            if (typeof next == 'function') next()
        })
    },
    //获取品牌列表
    getBrands() {
        wx.get('/brands').then(res => {
            this.setData({
                brands: res
            })
        })
    },
    /**
     * 生命周期函数--监听页面加载
     */


    onLoad: function (options) {
        this.setData({
            'query.key': options.key || '',
            'query.brandIds': options.brandIds || ''
        })
        this.getBrands()
        this.getList()
    },

    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady: function () {

    },

    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {

    },

    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {

    },

    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {

    },

    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {
        this.refresh(() => {
            wx.stopPullDownRefresh()
        })
    },

    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom: function () {
        this.data.query.pageNum++
        if (this.data.total > this.data.rows.length) {
            this.getList()
        }
    },

    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {

    }
})